Abstract
Abstract Sodium, calcium, and ammonium nitrates were compared as N sources on old ‘Valencia’ orange trees in Florida. Annual rates of 100, 200, 250, 300, and 400 lb. N per acre were supplied in a complete random block experiment. Sodium nitrate was not satisfactory because of thinness of foliage and reduced yields. With the other 2 sources, yields increased throughout the range of rates, although the largest increment of increase was between the 100 and 200-lb. rates. Moderate deficiency existed at the 100-lb. rate with all sources, but the trees were never yellow. The most prominent symptom of inadequate N was thinness of foliage from premature leaf abscission. Three-month-old leaves were a better index of N status and tree response than 5-, 8-, or 11-month-old leaves.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Sodium nitrate produced thin foliage and reduced yields.
- Taxon
- Valencia Orange Trees
Citrus sinensist0 - Treatment
- Sodium nitratee0
- Outcome
- foliagee0
- Direction
- thinnesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium nitrate was not satisfactory because of thinness of foliage and reduced yields.”
t0“Valencia Orange Trees”
Claim · model-written summary
Sodium nitrate reduced yields.
- Taxon
- Valencia Orange TreesCitrus sinensist0
- Treatment
- Sodium nitratee0
- Outcome
- yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium nitrate was not satisfactory because of thinness of foliage and reduced yields.”
t0“Valencia Orange Trees”
Claim · model-written summary
With calcium and ammonium nitrates, yields increased across the tested rates, most strongly between 100 and 200 lb.
- Taxon
- Valencia Orange TreesCitrus sinensist0
- Treatment
- calcium, and ammonium nitratese1
- Outcome
- yieldse0
- Direction
- increasede0
- Comparator
- 100 and 200-lb. ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the other 2 sources, yields increased throughout the range of rates, although the largest increment of increase was between the 100 and 200-lb. rates.”
e1“Sodium, calcium, and ammonium nitrates were compared as N sources”
t0“Valencia Orange Trees”
Claim · model-written summary
Moderate nitrogen deficiency occurred at 100 lb. with all sources, without yellow trees.
- Taxon
- Valencia Orange TreesCitrus sinensist0
- Treatment
- 100-lb. ratee0
- Outcome
- Moderate deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate deficiency existed at the 100-lb. rate with all sources, but the trees were never yellow.”
t0“Valencia Orange Trees”
Claim · model-written summary
Inadequate nitrogen was most visibly expressed as thin foliage from early leaf abscission.
- Taxon
- Valencia Orange TreesCitrus sinensist0
- Organ / stage
- leafe0
- Outcome
- thinness of foliagee0
- Direction
- most prominente0
- Qualifier
- inadequate Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most prominent symptom of inadequate N was thinness of foliage from premature leaf abscission.”
t0“Valencia Orange Trees”
Claim · model-written summary
Three-month-old leaves better indexed nitrogen status and tree response than older leaves.
- Taxon
- Valencia Orange TreesCitrus sinensist0
- Organ / stage
- Three-month-old leavese0
- Outcome
- index of N status and tree responsee0
- Direction
- bettere0
- Comparator
- 5-, 8-, or 11-month-old leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three-month-old leaves were a better index of N status and tree response than 5-, 8-, or 11-month-old leaves.”
t0“Valencia Orange Trees”
The same questions in other papers
calcium atom · yield · Citrus sinensis (sweet orange)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →ammonium nitrate · yield · Citrus sinensis (sweet orange)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.